PING dz-www.163cd.com (104.21.64.1) 56(84) bytes of data.
64 bytes from 104.21.64.1 (104.21.64.1): icmp_seq=1 ttl=60 time=6.63 ms
64 bytes from 104.21.64.1 (104.21.64.1): icmp_seq=2 ttl=60 time=4.09 ms
64 bytes from 104.21.64.1 (104.21.64.1): icmp_seq=3 ttl=60 time=4.09 ms

--- dz-www.163cd.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.090/4.940/6.639/1.203 ms